Din1 = 17
Din2 = 26

LedPin =12

freq = 1000

# 补光灯亮时长（毫秒）
global LEDLightTimeLen
LEDLightTimeLen= 0

L1 = 6
L2 = 13
L3 = 19
L4 = 5

#键盘扫描 column 
Column1 = 1
Column2 = 16
Column3 = 20
Column4 = 21